BRIEF OHNE UMSCHLAG Borngräber, Otto Author: Borngräber, Otto Recipient: Haeckel, Ernst Dating: 01.04.1900
BRIEF OHNE UMSCHLAG Borngräber, Otto Author: Borngräber, Otto Recipient: Haeckel, Ernst Dating: 14.04.1900
BRIEF OHNE UMSCHLAG Borngräber, Otto Author: Borngräber, Otto Recipient: Haeckel, Ernst Dating: 06.05.1900
BRIEF OHNE UMSCHLAG Borngräber, Otto Author: Borngräber, Otto Recipient: Haeckel, Ernst Dating: 12.05.1900
BRIEF OHNE UMSCHLAG Bernard, Matilda Author: Bernard, Matilda Recipient: Haeckel, Ernst Dating: 12.11.1893
BRIEF OHNE UMSCHLAG Bernard, Matilda Author: Bernard, Matilda Recipient: Haeckel, Ernst Dating: 09.02.1905
BRIEF OHNE UMSCHLAG Bernardelli, Paul Author: Bernardelli, Paul Recipient: Haeckel, Ernst Dating: 06.09.1908
BRIEF OHNE UMSCHLAG Bernhard, Jenny Author: Bernhard, Jenny Recipient: Haeckel, Ernst Dating: 20.12.1900